Steam-engine valve-gear.



W. S. BROWN. STEAM ENGINE VALVE GEAR. APPLICATION FILED MAY 10, 1913. 1,1 00,668.

Patented June 16,1914

2 SHEETS-SHEET 1.

WITNESSES Qdcu INVENTOR WM Attorney COLUMBIA PLANQGRAPH co..wAsHlN0'r0N,D. C.

W. s. BROWN. STEAM ENGINE VALVE GEAR. APPLICATION FILED MAY 10, 1913.

Patented June 16,1914.

2 SHEETS-SHEET 2.

INN .1 ON

NAN A I WfjYVESSES R w E 5 V m y w V In COLUMBIA PLANOaRMm C0,.WASHINGTON, B4 c.

UNITED STATES PATEN T OFFICE.

WILLIAM SHERMAN BROWN, 0F KNOXVILLE, TENNESSEE.

STEAM-ENGINE VALVE-GEAR.

To all whom it may concern:

Be it known that 1, WILLIAM SHERMAN BROWN, a citizen of the UnitedStates, residing at Knoxville, in the county of Knox and State ofTennessee, have invented a new and useful Improvement in Steam-EngineValve-Gear, of which the following is a specification, reference beinghad to the accompanying drawing.

My improvement relates particularly to mechanism for transmitting motionfrom the crank of a drive wheel of a steam locomotive to thedistributing valve which admits steam to the cylinder.

The object of the improvement is to pro vide a construction which issimple has the parts accessibly located, and which avoids irregularityof valve action due to lost motion or pounding at the crank,

This improvement is applicable to the mechanism described by my UnitedStates Patent No, 1,033,532, granted July 23, 1912, for Steam-enginevalve-gear In the accompanying drawings, Figure 1 is a side elevation,portions being broken away, showing my improvement applied to one sideof a locomotive; Fig. 2 is a plan of a portion of the mechanism shown byFig. 1; Fig. 3 is a section on the line, 33, of Fig. 2, looking towardthe right; Fig. 4 is a section on the line 4-4, of Fig. 2, looking inthe direction of the arrow; Fig. 5 is a plan of the bridge upon whichthe segment is seated; Fig. 6 is a side elevation of said bridge. Fig. 7is a section on the line 7-7, of Fig. 1 looking toward the left; Fig. 8is a plan of the hanger.

Referring to said drawings, 1, is the usual valve stem extending to thedistributing valve (not shown). The usual horizontal, parallelcross-head guide bars, 2, are supported at their rear ends by the guideyoke extension, 3. The usual connecting rod or pitman, 4, is coupled tothe usual main crank, 5, carried by a drive wheel, D. On the main crank,5, is rigidly mounted an auxiliary crank, 6, standing 90 degrees forwardof the main crank. To said auxiliary crank is con aled one end of theauxiliary pitman rod,

A bridge, B, is located above the frame, A, and extends from theordinary guide-yoke, 8, and guide-yoke extension, 3, to the cross beamor plate, 10, and is secured to said guide-yoke and to said cross-beamby means Specification of Letters Patent. Patented Jun 16 1914Application filed May 10, 1913.

Serial No. 766,876.

of bolts, 9. Said bridge is in the form of a plate having its lengthhorizontal and being turned to bring its long edges into an up.- rightplane. At its rear end, the bridge has a lateral extension, 11, restingagainst the cross-beam, 10, and receiving said bolts, 9. At its forwardend the bridge has a transverse extension, 12, reaching to both sides ofthe body of the bridge and resting against the guide yoke, 8, and theguide yoke extension, 3, and receiving said bolts, 9. The innermost ofsaid bolts extends through the transverse extension, 12, and the guideyoke, 8, while the others of said bolts extend through the transverseextension, 12, and through the guide yoke, 8, and the guide yokeextension, 3. On the outer portion of the transverse extension, 12, andintegral therewith, is an ear, 13, which is directed rearward; and onthe inner portion of said transverse extension is another ear, 14, alsodirected rearward and located horizontally opposite the ear, 13. Each ofsaid ears has a bearing, 15, receiving the ends of a shaft 16. 011 saidshaft is a bell crank or rocking member, G, preferably rotatable on saidshaft, the latter being held immovably in its bearings. Said bell crankhas two approximately horizontal arms, 17, and a depend ing arm, 18. Thelatter arm is coupled to the valve-stem, 1. By rocking the bell crank,the valve stem is reciprocated.

An approximately upright link, 19, has its upper end coupled to thearms, 17, of the bell crank, while its lower end is coupled to theforward end of the auxiliary pitinan rod, 6, both ends of said linkbeing forked to receive said rod and said arms, as shown in thedrawings. Said arms, 17, are also forked to receive the upper ends ofthe link, 19. On the upper edge of the bridge, B, are horizontal bosses,20. A hanger, H, has a lateral upper flange, 21, extending across thebridge, B, and secured thereto by bolts, 22, extending through saidflange and the bosses, 20, and horizontally through the hanger and thebridge. On said hanger is a bearing box, IE. Said box receives a shortrock shaft, 23, which is horizontal and transverse to the bridge and theframe, A. On the outerend of said shaft, 23, is a rocking member or arm,24, directed upward and having on its upper end a horizontal wrist, 25.An approximately upright link, 26,

has its upper end coupled to said wrist while its lower end is coupled,by means of a bolt, 27, to the auxiliary rod between the link, 19, andthe auxiliary crank, 6, at a point which is substantially in alinementwith the axis of said rock shaft, 23, when the auxiliary crank is on theupper or lower quarter, the hanger, H, bringing the axis of therockshaft to the proper height to effect such alinement.

The forward end of the auxiliary reach rod, 28, is coupled to the upperend of the rocking member or arm, 24, the forward end of the reach rodlying beside the upper end of said rocking arm and the upper end of thelink, 26, and the wrist, 25, extending through said three members. Therear end of said auxiliary reach rod is coupled to the upright arm, 29,which is rigid on the reversing shaft, 30, supported in bearings, 31. Onsaid reversing shaft is an arm, 32, to which is coupled a rod, 33, whichis in turn coupled to the ordinary reversing lever, 34, working on asector or quadrant, 35.

In operation, the rocking arm, 24, is set o bring its upper end into anydesired position in its curved path (the axis of which path is the axisof the shaft, 23), this being done by means of the reversing lever. Thesetting of the rocking member in such position carries the upper end ofthe link, 26, along said curved path into the same position, and theaxis of the wrist, 25, is then (and at all times) the axis ofoscillation of the link, 26, during the movements of the auxiliary rod.During each reciprocation, said auxiliary pitman rod rocks bodily withthe axis of the bolt, 27, as a fulcrum. This involves the rising andfalling of the forward end of said auxiliary rod, and during suchmovement of said end of said rod, the link, 19, is forced up and down,and such movement of said link causes the rocking of the bell crank, C,and the reciprocation of the valve stem, 1. The gear is reversed bythrowing the reversing lever across the center in the usual manner, andthe opening of the valve is varied by moving the upper end of therocking member or arm, 24, nearer to or farther from the upright planein which lies the axis of the rock-shaft, 23, this being accomplished bythe aid of suitable notches (not shown) on the reversing lever sector.hen the upper end of the rocking member or arm, 24, is on the middle ofits curved path (in said upright plane), the valve motion is reduced tothe extent of the lead The holes through which the bolts, 22, extend arelarger than the diameter of said bolts, in order to allow some shiftingof the hanger before tightening said bolts. In this way, horizontaladjustment of the hanger and the axis of the rocking member or arm 24,may be made. Upward adjustment of said axis may also be made by placingany suitable filing piece or pieces between the flange, 21, and theupper edge of the bridge.

The drawings have been copied in part from larger working drawings usedin applying my improvement to a railway freight locomotive having apiston stroke of 30 inches and having a maximum valve travel of 51;inches and a lead of three sixteenths of an inch. The radius of theauxiliary crank, 6, (measuring from the driver axis) is 8 and inches.The distance from the auxiliary crank along the auxiliary pitman rod, 7,to the axis of the bolt, 27, is 74 and 3/32 inches. From the latterpoint on said pitman rod to the link, 19, is 10 and 13/32 inches. Thelength of the link, 26, is and 11/16 inches, and that, as alreadydescribed, is also the length of the rocking arm, 24. The axis of thebolt, 27, is one and five sixte-cnths inches below the level of thedriver axis and the cylinder axis (the working line or center line ofmotion The length of the link, 19, is 32 inches. The height of the axisor fulcrum of the bell crank or rocking member, C, above the level ofthe center line of motion is 32 and 2/8 inches. The length of the arms,17 and 18, of the bell crank is 12 and inches. The rocking member, C, isnot a true bell crank, its angle being les than ninety degrees- 72degrees.

hen the engine is in forward motion and the main crank is on the backcenter and the auxiliary crank on the upper quarter, the arm, 17, is 2and degrees back of a vertical line cutting the fulcrum, and the arms,17, are 15 and degrees below a horizontal line cutting the fulcrum. henthe arm, 28, is set for full valve travel and inches), the forwardtravel of the arm, 18, from the position mentioned is 7 and degrees andthe back travel of said arm from said position is 19 degrees, and thearms, 17, travel downward and upward correspondingly. Thus the largerportion of the travel of the rocking member arms is within the 90 degreeangle formed by said vertical and said horizontal lines. These relativeproportions and positions of the various parts of the mechanism producethe desired quick movement of the valve during the opening and closingand also produce equalized travel of the valve over the port during theforward motion and during the backward motion.

It is to be observed that my improvement eliminates from the valvemechanism the eccentric'and also all parts having a high velocity. Nopart of the valve mechanism is connected to the connecting rod nor thecross-head. Movement is transmitted to the valve stem from the wrist ofthe auxiliary crank and said wrist travels in a relatively small circle.Thus the movement of the auxiliary rod and the links, 19 and 26, are Ithrough relatively short ranges. Furthermore, it is to be noted thatlost motion due to. wear at the wrist of the auxiliary crank willchiefly modify-the lengthwise move-- ment of the auxiliary pitman, 7,while the movement transmitted through the link, 19, iS approximately atright angles to said auxiliary pitman. Hence the modification or thelongitudinal movement of said pitman i substantially not transmitted tosaid link. And it will be seen that such modification of the rockingmovement of the auxiliary pitman due to wear at the wrist of the auxiliary crank will afiect the link, 19, in minimized form, because theportion of the auxiliary pitman between the axis, 27, and the link, 19,is much less than between said axis and the wrist of the auxiliarycrank. In this connection it is to be remembered that wear by theauxiliary crank wrist in the auxiliary pitman i chiefly in the directionof the length of said pitman. Such wear produces what is termed lostmotion or pounding at the crank.

I claim as my invention:

1. In a steam engine valve gear, the combination of a rocking member, areversing lever in operative relation with said rocking member, anauxiliary crank, an auxiliary rod having one end coupled to said crank,an approximately upright link coupled to said auxiliary rod between itsends and at a point which is substantially in alinement with the axis ofsaid rocking member when the auxiliary crank is on the upper quarter orthe lower quarter, and said link having its upper end coupled to thetree portion of said rocking member, and means connecting the outer endof said auxiliary rod into operative relation with the stem of thedistributing valve, substantially as described.

2. In a steam engine valve gear, the combination of a rocking memberextending upward from its axis, a reversing lever in operative relationwith said rocking member, an auxiliary crank, an auxiliary rod havingone end coupled to said crank, an approxi mately upright link coupled tosaid auxiliary rod between its ends and at a point which issubstantially in alinement with the axis of said rocking member when theauxiliary crank is on the upper quarter or the lower quarter and saidlink having its upper end coupled to the free portion of said rockingmember, and means connecting the outer end of said auxiliary rod intooperative relation with the stem of the distributing valve,substantially as described.

3. In a steam engine valve gear, the combination of a rocking member, areversing lever in operative relation with said rocking member, anauxiliary crank, an auxiliary rod having one end coupled to said crank,

an approximately upright link coupled to said auxiliary rod between itsends and at a point which is substantially in alinement with the axis ofsaid rocking member when the auxiliary rod is on the upper quarter orthe lower quarter and said link having its upper end coupled to the treeportion of said rocking member, and a bell crank in operative relationwith the outer end of said auxiliary rod and with the stem of thedistributing valve, substantially as described.

4. In a steam engine v alve gear, the combination of a rocking memberextending upward from its axis, a reversing lever in operative relationwith said rocking member, an auxiliary crank, an auxiliary rod havingone end coupled to said crank, an approximately upright link coupled tosaid auxiliary rod between its ends and at a point which issubstantially in alinement with the axis of said rocking member when theauxiliary crank is on the upper quarter or the lower quarter and saidlink having its upper end coupled to the free portion of said rockingmember, and a bell crank in operative relation with the forward end ofsaid auxiliary rod and with the stem of the distributing valve,substantially as described.

5. I11 a steam engine valve gear, the combination of a rocking member, areversing lever in operative relation with said rocking member, anauxiliary crank, an auxiliary rod having one end. coupled to said crank,an approximately upright link coupled to said auxiliary rod between itsends and at a point which is substantially in alinement with the axis ofsaid rocking member when the auxiliary crank is on the upper quarter orthe lower quarter, and a bell crank having its arms at an angle of lessthan ninety degrees, and one of said arms being in operative relationwith the outer end of the auxiliary rod and the other arm beinginoperative relation with the stem of the distributing valve,substantially as described.

6. In a steam engine valve gear, the combination of a hanger, a rockingmember supported by said hanger, a reversing lever in operative relationwith said rocking member, an auxiliary crank, an auxiliary rod havingone end coupled to said crank, an approximately upright link coupled tosaid auxiliary rod between its ends and at a point which issubstantially in alinement with the axis of said rocking member when theauxiliary crank is on the upper quarter or the lower quarter, and saidlink having its upper end coupled to the free portion of said rockingmember, and means connecting the outer end of said auxiliary rod intooperative relation with the stem of the distributing valve,substantially as described.

7. In a steam engine valve gear, the combination of an adjustablehanger, a rocking member supported by said hanger, a reversing lever inoperative relation with said rocking member, an auxiliary crank, anauxiliary rod having one end coupled to said crank, an approximatelyupright link coupled to said auxiliary rod between its ends and at apoint which is substantially in alinement with the axis of said rockingmember when the auxiliary crank is on the upper quarter or the lowerquarter, and said link having its upper end coupled to the free portionof said rocking member, and means connecting the outer end of saidauxiliary rod into operative relation with the stem of the distributingvalve, substantially as described.

8. In asteam engine valve gear, the combination of a bridge supported bythe main frame, a rocking member supported by said bridge, a reversinglever, in operative relation with said rocking member, an auxiliarycrank, an auxiliary rod having one end coupled to said crank, anapproximately upright link coupled to said auxiliary rod between itsends and at a point which is substantially in alinement with the axis ofsaid rocking member when the auxiliary crank is on the upper quarter orthe lower quarter, and said link having its upper end coupled to thefree portion of said rocking member, and means connecting the outer endof said auxiliary rod into operative rela tion with the stem of thedistributing valve, substantially as described.

9. In a steam engine valve gear, the combination of a bridge supportedby the main frame, a hanger on said bridge, a rocking member supportedby said hanger, a reversing lever in operative relation with saidrocking member, an auxiliary crank, an auxiliary rod having one endcoupled to said crank, an approximately upright link coupled to saidauxiliary rod between its ends and at a point which is substantially inalinement with the axis of said rocking member when the auxiliary crankis on the upper quarter or the lower quarter, and said link having itsupper end coupled to the tree portion of said rocking member, and meansconnecting the outer end of said auxiliary rod into operative relationwith the stem of the distributing valve, substantially as described.

10. In a steam engine valve gear, the combination of a bridge supportedby the main frame, a hanger adjustable on said bridge, a rocking memberon said hanger, a reversing lever in operative relation with saidrocking member, an auxiliary crank, an auxiliary rod having one endcoupled to said crank, an approximately upright link coupled to saidauxiliary rod between its ends and at a point which is substantially inalinement with the axis of said rocking member when the auxiliary crankis on the upper quarter or the lower quarter, and said link having itsupper end coupled to the free portion of said rocking member, and meansconnecting the outer end of said auxiliary rod into operative relationwith the stem of the distributing valve, substantially as described.

11. In a steam engine valve gear, the combination of a hanger, a rockingmember supported by said hanger, a reversing lever in operative relationwith said rocking member, an auxiliary crank, an auxiliary rod havingone end coupled to said crank auxiliary rod between its ends and at apoint which is substantially in alinement with the axis of said rockingmember when the auxiliary crank is on the upper quarter or the lowerquarter, and said link having its upper end coupled to the free portionof said rocking member, and a bell crank in operative relation with theouter end of said auxiliary rod and with the stem of the distributingvalve, substantially as described.

12. In a steam engine valve gear, the combination of an adjustablehanger, a rocking member supported by said hanger, a reversing lever inoperative relation with said rocking member, an auxiliary crank, anauxiliary rod having one end coupled to said crank, an approximatelyupright link coupled to said auxiliary rod between its ends and at apoint which is substantially in alinement with the axis of said rockingmember when the auxiliary crank is on the upper quarter or the lowerquarter, and said link having its upper end coupled to the free portionof said rocking member, and a bell crank in operative relation with theouter end of said auxiliary rod and with the stem of the distributingvalve, substantially as described.

13. In a steam engine valve gear, the combination of a bridge supportedby the main frame, a rocking member supported by said bridge, areversing lever in operative relation with said rocking member, anauxiliary crank, an auxiliary rod having one end coupled to said crank,an approximately up right link coupled to said auxiliary rod between itsends and at a point which is substantially in alinement with the axis of1.

said rocking member when the auxiliary crank is on the upper quarter orthe lower quarter, and said link having its upper end coupled to thefree portion of said rocking member, and a bell crank in operativerelation with the outer end of said auxiliary rod and with the stem ofthe distributing valve, substantially as described.

14. In a steam engine valve gear, the combination of a bridge supportedby the main frame, a hanger on said bridge, a rocking member supportedby said hanger, a reversing lever in operative relation with saidrocking member, an auxiliary crank, an auxiliary rod having one endcoupled to said crank, an approximately upright link coupled to saidauxiliary rod between its ends and at a point which is substantially inalinement with the axis of said rocking member when the auxiliary crankis on the upper quarter or the lower quarter, and said link having itsupper end coupled to the free portion of said rocking member, and a bellcrank in operative relation with the outer end of said auxiliary rod andwith the stem of the distributing valve, substantially as described.

15. In a steam engine valve gear, the combination of a bridge supportedby the main frame, a hanger adjustable on said bridge, a rocking memberon said hanger, a reversing lever in operative relation with saidrocking member, an auxiliary crank, an auxiliary rod having one endcoupled to said crank, an approximately upright link coupled to saidauxiliary rod between its ends and at a point which is substantially inalinement with the axis of said rocking member when the auxiliary crankis on the upper quarter or the lower quarter, and said link having itsupper end coupled to the free portion of said rocking member, and a bellcrank in operative relation with the outer end of said auxiliary rod andwith the stem of the distributing valve, substantially as described.

16. In a steam engine valve gear, the combination of a bridge, a hangerhaving an upper flange extending across said bridge, a rocking member onsaid hanger, a reversing lever in operative relation with said rockingmember, an auxiliary crank, an auxiliary rod having one end coupled tosaid crank, an approximately upright link coupled to said auxiliary rodbetween its ends and at a point which is substantially in alinement withthe axis of said rocking member when the auxiliary crank is on the upperquarter or the lower quarter, and said link having its upper end coupledto the free portion of said rocking member, and means connecting theouter end of said auxiliary rod into operative relation with the stem ofthe distributing valve, substantially as described.

17. In a steam engine valve gear, the combination of a rocking member, areversing lever, a reversing shaft in operative relation with saidreversing lever and with said r0ck ing member, an auxiliary crank, anauxiliary rod having one end coupled to said crank, an approximatelyupright link coupled to said auxiliary rod between its ends at a pointwhich is substantially in alinement with the axis of said rocking memberwhen the auxiliary crank is on the upper quarter or the lower quarter,and said link having its upper end coupled to the free portion of saidrocking member, and

means connecting the outer end of said auxiliary rod into operativerelation with the stem of the distributing valve, substantially asdescribed.

18. In a steam engine valve gear, the combination of a hanger, a rockingmember on said hanger, a reversing lever, a reversing shaft in operativerelation with said reversing lever and with said rocking member, anauxiliary crank, an auxiliary rod having one end coupled to said crank,an approximately upright link coupled to said auxiliary rod between itsends and at a point which is substantially in alinement with the axis ofsaid rocking member when the auxiliary crank is on the upper quarter orthe lower quarter, and said link having its upper end coupled to thefree portion of said rocking member, and means connecting the outer endof said auxiliary rod into operative relation with the stem of thedistributing valve, substantially as described.

19. In a steam engine valve gear, the combination of a bridge supportedby the main frame, a rocking member supported by said bridge, areversinglever, a reversing shaft in operative relation with said reversing leverand with said rocking member, an auxiliary crank, an auxiliary rodhaving one end coupled to said crank, an approximately upright linkcoupled to said auxiliary rod between its ends and at a point which issubstantially in alinement with the axis of said rocking member when theauxiliary crank is on the upper quarter or the lower quarter, and saidlink having its upper end coupled to the free portion of said rockingmember, and means connecting the outer end of said auxiliary rod intooperative relation with the stem of the distributing valve,substantially as described.

20. In a steam engine valve gear, the combination of a bridge supportedby the main frame, a hanger adjustable on said bridge, a rocking memberon said hanger, a reversing lever, a reversing shaft in operativerelation with said reversing lever and with said rocking member, anauxiliary crank, an auxiliary rod having one end coupled to said crank,an approximately upright link coupled to said auxiliary rod between itsends and at a point which is substantially in alinement with the axis ofsaid rocking member when the auxiliary crank is on the upper quarter orthe lower quarter, and said link having its upper end coupled to thefree portion of said rocking member, and means connecting the outer endof said auxiliary rod into operative relation with the stem of thedistributing valve, substantially as described.

21. A valve gear comprising, in combination, a frame, an arm supportingcarried thereby, a pivoted arm carried by the sup port, an auxiliaryconnecting rod, means for transmitting motion to the rod, a connectionpivoted to the rod and to the arm, and means for connecting the rod tothe valve for the operation thereof.

22. A valve gear comprising, in combination, aframe, an arm supportcarried thereby, a pivoted arm carried by the sup port, an auxiliaryconnecting rod, means for transmitting motion to the rod, a connectionpivoted to the rod and to the arm, and means for connecting the rod tothe valve for the operation thereof, said frame and said arm supportingbeing disposed for relative movement and provided with means forsecuring them in predetermined posi tion.

23. A valve gear comprising, in combination, a frame, an arm supportcarried thereby, a pivoted arm carried by the support, an auxiliaryconnecting rod, means for transmitting motion to the rod, a connec tionpivoted to the rod and to the arm, and means for connecting the rod tothe valve for the operation thereof, one of said frame and said armsupport members being provided with an elongated aperture and the otherwith means engaging therewith whereby they may be secured inpredetermined position.

24:. A valve gear comprising, in combination, a frame, an arm supportcarried thereby, a pivoted arm carried by the support, an auxiliaryconnecting rod, means for transmitting motion to the rod, a connectionpivoted to the rod and to the arm, and means for connecting the rod tothe valve for the operation thereof, one of said frame and said armsupport members being provided with a threaded bolt and the other with athreaded portion engaging therewith whereby the relative relation of thesupport and the frame may be varied.

25. A valve gear comprising, in combination, a frame, an arm supportcarried thereby, a pivoted arm carried by the support, an auxiliaryconnecting rod, means for transmitting motion to the rod, a connectionpivoted to the rod and to the arm, and means for connecting the rod tothe valve for the operation thereof, said frame and said arm supportmembers being provided with means for varying their relation vertically.

26. A valve gear comprising, in combination, a frame, an arm supportcarried thereby, a pivoted arm carried by the support, an auxiliaryconnecting rod, means for transmitting motion to the rod, a connectionpivoted to the rod and to the arm, and means for connecting the rod tothe valve for the operation thereof, said frame and said arm supportmembers being provided with means for varying their relationhorizontally.

27. A valve gear comprising, in combination, aframe, an arm supportcarried thereby, a pivoted arm carried by the support, an auxiliaryconnecting rod, means for transmitting motion to the rod, a connectionpivoted to the rod and to the arm, and means for connecting the rod tothe valve for the operation thereof, said frame and said arm supportmembers being provided with interposed means for varying their relationvertically.

28. A valve gear comprising, in combination, a pivoted arm, an auxiliaryconnecting rod, means for transmitting motion to the rod, a connectionpivoted to the rod and to the arm, and means for connecting the rod tothe valve for the operation thereof.

29. A valve gear comprising, in combination, a movable support, means inoperative relation thereto for moving the support, an auxiliary rod,means for transmitting motion to the rod, a connection pivoted to therod and forming a fulcrum therefor, and pivoted to the support, meansfor connecting the rod to the valve for the operation thereof, and meansfor varying the position of the fulcrum vertically.

30. A valve gear comprising, in combination, a movable support, means inoperative relation thereto for moving the support, an auxiliary rod,means for transmitting motion to the rod, a connection pivoted to thesupport, means for connecting the rod to the valve for the operationthereof, and means for varying the position of the fulcrum verticallyrelatively to a horizontal line coincident with the axis of the meansfor transmitting motion.

31. A valve gear comprising, in combination, a movable support, means inoperative relation thereto for moving the support, an auxiliary rod,means for transmitting motion to the rod, a connection pivoted to therod and forming a fulcrum therefor, and pivoted to the support, meansfor connecting the rod to the valve for the operation thereof, and meansfor varying the position of the movable support vertically.

32. A valve gear comprising, in eombination, a movable support, means inoperative relation thereto for moving the support, an auxiliary rod,means for transmitting motion to the rod, a connection pivoted to therod and forming a fulcrum therefor, and pivoted to the support, meansfor connecting the rod to the valve for the operation thereof, and meansfor varying the position of the movable support vertically relatively toa horizontal line coincident with the axis of the means for transmittingmotion.

33. A valve gear comprising, in combination, a movable support, means inoperative relation thereto for moving the support, an auxiliary rod,means for transmitting motion to the rod, a connection pivoted to therod and forming a fulcrum therefor, and pivoted to the support, meansfor connecting the rod to the valve for the operation thereof, and meansfor varying the position of the movable support horizontally.

34. A valve gear comprising, in combination, a movable support, means inoperative relation thereto for moving the support, an auxiliary rod,means for transmitting motion to the rod, a connection pivoted to therod and forming a fulcrum therefor, and pivoted to the support, meansfor connecting the rod to the valve for the operation thereof, and meansfor varying vertically the pivot point of said support on said connection relatively to said fulcrum.

35. A valve gear, comprising, in combination, a movable support, meansin operative relation thereto for moving the support, an auxiliary rod,means for transmitting motion to the rod, a connection pivoted to therod and forming a fulcrum therefor and pivoted to the support, means forconnecting the rod to the valve for the operation thereof, and means forvarying horizontally the pivot point of said support on said connectionrelatively to said fulcrum.

36. A valve gear comprising, in combination, a frame provided with anarm support movable relatively thereto, an upwardly disposed rocker armpivoted in said support, means for moving the upper end of said arm, anauxiliary rod, means for transmitting motion to the rod, a fulcrum linkpivoted to the rod and to the upper portion of the rocker arm, a pivotedbell crank for operating the valve, a connecting link for transmittingmotion from the rod to the bell crank, and means for varying therelation of the fulcrum point of said first mentioned link relatively tothe pivot point of said bell crank.

37. A valve gear comprising, in combination, a frame provided with anarm support movable relatively thereto, an upwardly disposed rocker armpivoted in said support, means for moving the upper end of said arm, anauxiliary rod, means for transmitting motion to the rod, a fulcrum linkpivoted to the rod and to the upper portion of the rocker arm, a pivotedbell crank for operating the valve, a connecting link for transmittingmotion from the rod to the bell crank, and means for varying therelation of the rocking axis of said rocker arm relatively to the pivotpoint of said bell crank.

38. A valve gear comprising, in combination, a frame provided with anarm support movable relatively thereto, an upwardly disposed rocker armpivoted in said support, means for moving the upper end of said arm, anauxiliary rod, means for transmitting motion to the rod, a fulcrum linkpivoted to the rod and to the upper portion of the roc er arm, a pivotedbell crank for operating the valve, a connecting link for transmittingmotion from the rod to the bell crank, and means for varying therelation of the pivot point of said rocker arm and fulcrum linkrelatively to the pivot point of said bell crank.

In testimony whereof I have signed my name, in presence of twowitnesses, this eighth day of May, in the year one thousand nine hundredand thirteen.

W'ILLIAM SHERMAN BROWN.

Witnesses:

CYRUS KEHR, N. N. BAYDEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of latents, Washington, D. (1.

